Aircraft Operations. Volume II - Construction of Visual and Instrument ...

II-1-1-18 Procedures — Aircraft Operations — Volume II
and MOC is:
50 m (164 ft) (Cat H, 40 m (132 ft)) for turns more than 15° and
30 m (98 ft) for turns 15° or less.
If the obstacle elevation/height exceeds this value, the OCA/H must be increased, or the TP moved to obtain the
required clearance (see Appendix A).
23/11/06
1.6 SIMULTANEOUS PRECISION APPROACHES TO PARALLEL OR
NEAR-PARALLEL INSTRUMENT RUNWAYS
Note.— Guidance material is contained in the Manual on Simultaneous Operations on Parallel or Near-Parallel
Instrument Runways (Doc 9643).
1.6.1 General
When it is intended to use precision approach procedures to parallel runways simultaneously, the following additional
criteria shall be applied in the design of both procedures:
a) the maximum intercept angle with the final approach course is 30°. The point of intercepting final approach
course should be located at least 3.7 km (2.0 NM) prior to the point of intercepting the glide path;
b) the minimum altitudes of the intermediate approach segments of the two procedures differ by at least 300 m
(1 000 ft); and
c) the nominal tracks of the two missed approach procedures diverge by at least 30°. Associated missed approach
turns shall be specified as “as soon as practicable”.
1.6.2 Obstacle clearance
The obstacle clearance criteria for precision approaches, as specified in the designated chapters apply for each of the
parallel precision procedures. In addition to these criteria, a check of obstacles shall be made in the area on the far side
of the parallel runway in order to safeguard early turns required to avoid potential intruding aircraft from the adjacent
runway. This check can be made using a set of separately defined parallel approach obstacle assessment surfaces
(PAOAS). An example of a method to assess obstacles for these procedures is included in Appendix D.
1.7 PROMULGATION
1.7.1 General
1.7.1.1 The general criteria in Part I, Section 2, Chapter 1, 1.9, “Promulgation” apply. The instrument approach
chart for an ILS approach procedure shall be identified by the title ILS Rwy XX. If Category II and/or III minima are
included on the chart, the title shall read ILS Rwy XX CAT II or ILS Rwy XX CAT II & III, as appropriate. If more
than one ILS approach is published for the same runway, the Duplicate Procedure Title convention shall be applied,
with the approach having the lowest minima being identified as ILS Z RWY XX.